Jake tries to stop Charles going "full Boyle" in his new relationship with Vivian. Meanwhile, Rosa and Amy deal with a caped vigilante, and Holt faces competition at the police organization he founded.

The squad takes part in a mandatory training day, competing with other regional precincts. On the training day, Amy runs into Teddy, a fellow officer she used to date. Meanwhile, Holt becomes addicted to a game on his phone and Rosa is snubbed by Charles.

When Charles picks Jake as his best man, Peralta tries to convince him to stand up to Vivian. Meanwhile, Gina and Amy help Terry adhere to a new diet, while Holt forces Rosa to apologize to an officer she humiliated.